61520930 has 8 divisors (see below), whose sum is σ = 110737692. Its totient is φ = 24608368.

The previous prime is 61520923. The next prime is 61520971. The reversal of 61520930 is 3902516.

61520930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 61512649 + 8281 = 7843^2 + 91^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 61520930.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3076037 + ... + 3076056.

Almost surely, 2^61520930 is an apocalyptic number.

61520930 is a deficient number, since it is larger than the sum of its proper divisors (49216762).

61520930 is a wasteful number, since it uses less digits than its factorization.

61520930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6152100.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 61520930 is about 7843.5279052222. The cubic root of 61520930 is about 394.7671115564.

The spelling of 61520930 in words is "sixty-one million, five hundred twenty thousand, nine hundred thirty".